The DX3L Series has all the features of our DX3 model, but built to run on 24 volts. The DX3L Series represents the highest in quality, single-stage, low intensity tube heaters. Performance is enhanced through the use of a specially designed stainless steel burner and black coated titanium stabilized and/or aluminized coated steel radiant tube exchangers. The DX3L series offers superior low intensity heat, performance and longevity.